Task Scheduler calculates run duration time incorrectly

Jul-19 2008 using Task Scheduler I changed a user started task to start at
system startup from a user login startup.

As this is a great tool for controlling task execution I was following its
process.

I restarted my computer at 19-jul-2008 12:18:02 GMT. Now more than 48
hours after I restarted my computer I displayed all running tasks in Task
Tscheduler. Under The display's Run Duration column every task displayed has
5 hours 30 minutes to 5 hours 42 minutes of duration, depending on how the
task is started. All running tasks displayed are started either on 19th of
July or the 20th.